JPH0522489Y2 - - Google Patents

Description

[Detailed description of the invention] [Summary] In an inclined drop device in which small parts (hereinafter referred to as workpieces) fall along an inclined rail, a fixed shaft is provided on the upper guide rail, and the floating dimension is set to the diameter of the fixed shaft. A deceleration mechanism for a tilt-drop device that has a deceleration ring with an additional hole diameter attached to the shaft.

[Industrial application field]

The present invention relates to an improvement of a mechanism for reducing the falling speed of a workpiece in an apparatus that uses gravity to drop a workpiece along an inclined rail for continuous processing.

In a tilt-drop type device that processes workpieces continuously, it is desirable to use rails with as large an inclination as possible to quickly feed and process the workpieces, but as the inclination angle of the rail increases, the falling speed increases. Because of this, it is necessary to reduce the speed at the processing location, and there is a particular need for a mechanism that can reduce the speed without damaging the workpiece.

[Conventional technology]

The deceleration mechanism of the conventional inclined drop type device consists of a shaft 4 fixed to an upper guide rail 3, as shown in Fig. 4.
Four all-metal deceleration rings B6 having holes with a size equal to the diameter of the shaft 4 plus the floating dimension are attached via spacers 7 to the workpiece 5 falling along the rail 2 and the workpiece 5 falling along the rail 2. 4 deceleration rings B6
The deceleration is achieved by the rotation and sliding friction caused by the contact between the two.

[Problem that the invention attempts to solve]

The problem with the conventional deceleration mechanism of the inclined drop type device described above is that since the deceleration ring B6 is made of metal, the frictional force between it and the workpiece 5 is small and there is not much deceleration effect. Due to the contact with the deceleration ring B6, the workpiece 5 may be contaminated with dirt due to the friction of the deceleration ring B6, or if the workpiece 5 is insufficiently strong, chips may occur.

The object of the present invention is to provide a speed reduction mechanism for an inclined drop type device that can be implemented simply and inexpensively in view of the above-mentioned circumstances.

[Means for solving problems]

The above problems are solved by using an inclined drop type device in which the workpiece falls along an inclined rail, where a shaft is fixed to an upper guide rail, the shaft has a hole with a diameter equal to the shaft diameter plus the floating dimension, a groove is formed around the entire circumference, and a deceleration ring is attached to the shaft symmetrically about the center of the upper guide rail. The deceleration ring is equipped with a ring-shaped member with high friction that can be easily attached and detached to the groove.

[Effect]

In other words, in the present invention, in areas where there is no deceleration ring, the workpiece falls along the rail depending on the inclination angle of the rail and the friction coefficient between the rail and the workpiece; When the workpiece makes contact, the deceleration ring floats up to allow the workpiece to pass between the deceleration ring and the rail.
The deceleration ring rotates along the surface of the workpiece without slipping, and the weight of the deceleration ring is applied to the surface of the workpiece, so the workpiece is held against the rail by this force and its falling speed is reduced.

〔Example〕

Hereinafter, with reference to FIGS. 1, 2, and 3, an embodiment will be described in which the workpiece of the present invention is a dual-in type IC and an O-ring is attached around the deceleration ring.

FIG. 1 is a diagram showing the structure of an embodiment of a deceleration ring according to the present invention, in which a is a sectional view and b is a side view.

The O-ring 1b is fitted into a groove around the main body 1c, and in the center there is a deceleration ring A with the diameter of the shaft 4.
A hole A1a having a diameter equal to the floating dimension of 1 is bored.

Fig. 2 is a view seen from the traveling direction of the workpiece 5, and the workpiece 5 is placed on a rail 2 whose width corresponds to the width dimension of the workpiece 5. An upper guide rail 3 having a width corresponding to the width of the upper guide rail 3 is provided with a gap through which the workpiece 5 can pass. Surrounding materials with large frictional force,
For example, the deceleration ring A1 with an O-ring attached has a hole A in the shaft 4 fixed to the upper guide rail 3.
1a, so that it can float upward.

The dimensions of an example of deceleration ring A1 are 16 mm in outer diameter,
The hole diameter is 6.6 mm, the width is 2.5 mm, and the shaft diameter is 3 mm.

FIG. 3 is a view seen from a direction perpendicular to the traveling direction of the workpiece 5. FIG. 3a shows the state when the workpiece 5 is not on the rail 2, and FIG. This shows the situation when the rail 2 is between the rail 2 and the rail 2.

When the workpiece 5 falls from above along the rail 2, when the workpiece 5 comes into contact with the deceleration ring A1 provided at a position where deceleration is required, the deceleration ring A1
floats upward and the space between it and the rail 2 becomes wider, the workpiece 5 is sandwiched between the deceleration ring A1 and the rail 2, the deceleration ring A1 rotates, and the force due to its weight is applied to the workpiece 5, causing the workpiece 5 to fall. The speed is reduced.

[Effect of idea]

As explained above, according to the present invention, by using a deceleration ring with an extremely simple configuration, the deceleration ring rotates as the workpiece falls, ensuring the falling speed at the required position without damaging the workpiece. can be slowed down.

In addition, since the falling speed can be reliably reduced, it is also possible to increase the inclination angle of the rail to increase the falling speed of the workpiece as much as possible.
If the rail length is the same, it is possible to shorten the overall length of the device, which is also effective in downsizing the device.

[Brief explanation of the drawing]

Fig. 1 is a diagram showing the structure of an embodiment of a deceleration ring according to the invention, Fig. 2 is a front view showing an embodiment of the invention, and Fig. 3 is a side view showing an embodiment of the invention. FIG. 4 is a front view showing the prior art. In the figure, 1 is deceleration ring A, 1a is hole A,
1b is an O-ring, 1c is a main body, 2 is a rail, 3 is an upper guide rail, 4 is a shaft, 5 is a workpiece, 6 is a deceleration ring B, and 7 is a spacer.

Claims (1)

[Claims for Utility Model Registration] In an inclined drop type device in which a workpiece 5 falls along an inclined rail 2, a shaft 4 fixed to an upper guide rail 3 is attached to the shaft 4.
Hole A, 1 with a hole diameter equal to the shaft diameter plus the floating dimension
A deceleration ring A, 1, which has a groove formed around the entire circumference and is provided with a ring-shaped member 1b with a large frictional force that can be easily attached and detached to the groove, is attached to the center of the upper guide rail 3. A deceleration mechanism for an inclined drop type device, characterized in that a plurality of deceleration mechanisms are mounted symmetrically on a shaft.